Interesting SourceForge projects

http://sourceforge.net/projects/dvdstyler
DVDStyler is a cross-platform DVD authoring application that makes possible for video enthusiasts to create professional-looking DVDs.

http://sourceforge.net/projects/filezilla
FileZilla is a cross-platform graphical FTP, FTPS and SFTP client a lot of features, supporting Windows, Linux, Mac OS X and more. FileZilla Server is a reliable FTP server for Windows.

http://sourceforge.net/projects/audacity
A fast multi-track audio editor and recorder for Linux, BSD, Mac OS, and Windows.Supports WAV, AIFF, Ogg, and MP3 formats.Features include envelope editing, mixing, built-in effects and plug-ins, all with unlimited undo.

http://sourceforge.net/projects/freenas
NAS (Network Attached Storage) server supporting: CIFS/SMB, FTP, NFS, RSYNC, SSH, AFP, Unison, UPnP, Webserver, iSCSI protocols, local and MS AD authentication, SoftRAID (JBOD,0,1,5), disk encryption, S.M.A.R.T, WebGUI. Requires only 32MB on DOM.

http://sourceforge.net/projects/freemind
A mind mapper, and at the same time an easy-to-operate hierarchical editor with strong emphasis on folding. These two are not really two different things, just two different descriptions of a single application. Often used for knowledge and content mgmt.